Elements 10 Won't Minimize or Close on MacOS

I have Photoshop Elements 10 on an iMac using Snow Leopard. When I open editor, I can't use any function whatsoever. In fact, I can't even minimize or close the program and have to use a Force Quit to restart my computer. I have used Elements 10 since 2011 and have installed all updates to my Mac. When I try to sign-in with Elements 10, I get a message that my password does not exist. I accessed my account and even changed my Adobe password. Still, I can't even sign in to Elements 10.